Golovanov E.V., Kashin V.V., Gorbachev I.A., Kolesov V.V., Zakharov A.V., Dol'nikov G.G. «Piezoelectric sensors for studying the Moon plasma-dust exosphere» Радиоэлектроника. Наносистемы. Информационные технологии, 16, № 7, с. 829-836 (2024)

The scientific research program of lunar landers includes an experiment involving the study of the dynamics of lunar microparticles and the parameters of the near-surface dust plasma. Near-surface plasma and levitating dust particles form the Moon plasma-dust exosphere. To register the mechanical characteristics of dust microparticles, it is necessary to develop an impact sensor. As a sensitive element for the impact sensor, the shock sensitivity of various piezoelectric materials was experimentally studied: lithium niobate single crystals, PZT-19 piezoceramics, as well as a piezopolymer film of polyvinylidene fluoride. To register electrical signals on the piezoelectric sensors surface, a measuring stand with the original topology of the electrode system on the plates has been developed. The sensitivity of various piezoelectric sensors to impact, the response times of the sensor to impact, as well as the coordinates of the impact points on the sensor plates were measured.

Golovanov E.V., Kashin V.V., Gorbachev I.A., Kolesov V.V., Zakharov A.V., Dol'nikov G.G. «Piezoelectric sensors for studying the Moon plasma-dust exosphere» Радиоэлектроника. Наносистемы. Информационные технологии, 16, № 7, с. 829-836 (2024)

The scientific research program of lunar landers includes an experiment involving the study of the dynamics of lunar microparticles and the parameters of the near-surface dust plasma. Near-surface plasma and levitating dust particles form the Moon plasma-dust exosphere. To register the mechanical characteristics of dust microparticles, it is necessary to develop an impact sensor. As a sensitive element for the impact sensor, the shock sensitivity of various piezoelectric materials was experimentally studied: lithium niobate single crystals, PZT-19 piezoceramics, as well as a piezopolymer film of polyvinylidene fluoride. To register electrical signals on the piezoelectric sensors surface, a measuring stand with the original topology of the electrode system on the plates has been developed. The sensitivity of various piezoelectric sensors to impact, the response times of the sensor to impact, as well as the coordinates of the impact points on the sensor plates were measured.

Kuz'kin V.M., Pereselkov S.A., Tkachenko S.A., Pereselkov A.S., Grachev V.I. «Underwater noise source localization by a moving receiver based on holographic processing» Радиоэлектроника. Наносистемы. Информационные технологии, 16, № 7, с. 931-940 (2024)

The scenario of underwater situation mobile robotic monitoring by a single vector-scalar receiver placed on board a moving autonomous uninhabited underwater vehicle is presented. Underwater noise source detection and localization is based on holographic processing of sonar signals interferograms. An algorithm for restoring a moving underwater source parameters is described. The numerical simulation results are presented. The errors of restoring the source parameters are analyzed.

Grigoriev S.N., Kozochkin M.P., Volosova M.A., Okunkova A.A. «Acoustic monitoring of laser pulses in processing of metal-ceramic hard alloy» Контроль. Диагностика, 27, № 12, с. 33-41 (2024)

This work is devoted to studying the relationship between the factors of processing with laser pulses of T15K6 hard alloy, the parameters of acoustic emission, and process productivity. The laser source was a pulsed fiber laser with a wavelength of 1064 nm, a power of 20 to 60 W, and pulse duration of 250 to 500 ns. The main dependencies for the lower and upper frequency ranges (10–28 kHz and 32–70 kHz) were plotted. Acoustic emission signals provide insight into the effects of concentrated energy flows on material and can be used to understand hard-to-observe phenomena and ongoing processing performancence. Keywords: vibroacoustic emission, laser processing, control, productivity, cutting insert, spectral analysis, hard alloy T15K6.